The Scorpion Non-resonated GPF back system for the A-Class A45S W177 delivers enhanced exhaust flow and a more aggressive auditory character. This performance-focused system bypasses the factory resonator, reducing back pressure whilst maintaining gasoline particulate filter compliance. Engineered for drivers seeking improved throttle response and a sportier exhaust note without sacrificing emissions standards. Direct bolt-on fitment ensures straightforward installation on your A45S.